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PE(,,610065)PE,,PE4080m,44136015m:,,[1],,,[2],,,PE,,,PE1111PE(),,15mm,280mm,:PE()0152m,3012%,PE()25m,3914%,YDN1011251(25)(mPas)(mN/m)w11072i10175%(v/v)01960i2212%(v/v)019491122[3],,16PEPE,,,,,,[4]((SONYDSC2P110)(XS218)),,45,018L/min,12211,2013L/min,1151m/sPE()2,PE,,,21221211,()[5],PE2,PE,3013L/min,1151m/sPE,3(a),PE()4060m,PE()6080m3(b),PE()5212m,PE()5817m321212,4(a)(b),,4(b)(d),012L/min014L/min,PE()5017m4516m;PE()5716m5213m21120086421213,,5(a)(b),,5(a),60m80%4(b)(d),1101m/s1178m/s,PE()5317m4715m;PE()6015m5017m521214,,6,6(a)(b),,,,,6(b)(d),72mN/m49mN/m,PE()4718m4413m;PE()5615m4916m,,63,,,,,,,,Laplace[6]:deq=2pg-ph(1),deq,,Pg,PhPg-Ph,(1),,,,,,,,(2)[7]:p=2Lrp(2)36PEP,L,rP,,,,,S1E1ForresterC1D1Rielly[8],,,deq:deq=8d0CDU20L015(3),CD,U0,d0,(3),,,,4,PE44136015m,4080m,,PE,,,,,,PE,,,,,[1],,.[J].,1991,17(6):355360[2]KiuruHJ.Developmentofdissolvedairflotationtechnologyfromthefirstgenerationtothenewestone[J].WaterScienceTech2nology,2001,43(18):17[3],,,.[J].,2006,7(9):7882[4],,,.ES2DAF[J].,2004.25(1)[5]RodriguesRT,RubioJ.newbasisformeasuringthesizedistri2butionofbubbles[J].MineralsEngineering,2006,16:757765[6]RyanWL,HenningsenEA.Bubbleformationatporoushydro2phobicsurfaces[J].ColloidAndInterfaceScience,1998,197:101107[7]KazakisNA,MouzaAA,ParasSV.Experimentalstudyofbubbleformationatmetalporousspargers:Effectofliquidpropertiesandspargercharacteristicsontheinitialbubblesizedistribution[J].ChemicalEngineeringScience,2008,137:256281[8]TakahiroA,TakahiroY,ShuichiS.Micro2bubbleformationwithorganicmembraneinamultiphasemicrofluidicsystem[J].SensorsandActuators,2008,143:5863[9].[M].:,1995,132133StudiesofMicrobubbleFormationbyPEMicroporousanditsTheoreticsWuShengjun,FangWeimao,ZhaoHongwei,ChangYuqi,LinXueli,XiongYing,FengBo(CollegeofChemicalEngineering,SichuanUniversity,Chengdou610065,Sichuan,China)Abstract:Theimprovementofmicrobubbleformationisakeyofapplicationairfloatationtechnology.TheconditionofusingPEmicroporoustubetoproducemicrobubblesbyhigh2speedcross2flowwasstudied,theeffectofporesize,airflowrate,cross2flowrateandLiquidpropertiesontheinitialbubblesizedistributionwereanalysisedonthemechanismofbubbleformation.Thebubblesizedistributioninthisunitwasmeas2uredbystaticmicro2videoandimageanalyticssystem.Theseresultssuggestthatthemicrobubbleswhosediameterisdominatedfrom40mto80m,theinitialbubblesizedistributiondependstronglyonporesizeandfacialcharacteristicsofthemembranetube,cross2flowrateandliquidsurfacetension.Keywords:airflotation;ceramicmicroporoustube;microbubbles;bubblesizedistribution41120086